
/**
 * 格式化时间的辅助类，将一个时间转换成x小时前、y天前等
 */
var dateUtils = {
	UNITS: {
		'年': 31557600000,
		'月': 2629800000,
		'天': 86400000,
		'小时': 3600000,
		'分钟': 60000,
		'秒': 1000
	},
	humanize: function(milliseconds) {
		var humanize = '';
		mui.each(this.UNITS, function(unit, value) {
			if(milliseconds >= value) {
				humanize = Math.floor(milliseconds / value) + unit + '前';
				return false;
			}
			return true;
		});
		return humanize || '刚刚';
	},
	format: function(dateStr) {
		var date = this.parse(dateStr)
		var diff = Date.now() - date.getTime();
		if(diff < this.UNITS['天']) {
			return this.humanize(diff);
		}
		
		var _format = function(number) {
			return(number < 10 ? ('0' + number) : number);
		};
		return date.getFullYear() + '/' + _format(date.getMonth() + 1) + '/' + _format(date.getDay()) + '-' + _format(date.getHours()) + ':' + _format(date.getMinutes());
	},
	parse:function (str) {//将"yyyy-mm-dd HH:MM:ss"格式的字符串，转化为一个Date对象
		var a = str.split(/[^0-9]/);
		return new Date (a[0],a[1]-1,a[2],a[3],a[4],a[5] );
	}
};